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/*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <utility>
#include <keymaster/km_openssl/aes_key.h>
#include <trusty_ipc.h>
namespace keymaster {
class TrustyAesKeyFactory : public AesKeyFactory {
public:
explicit TrustyAesKeyFactory(const SoftwareKeyBlobMaker& blob_maker,
const RandomSource& random_source)
: AesKeyFactory(blob_maker, random_source),
hwwsk_chan_(INVALID_IPC_HANDLE) {}
~TrustyAesKeyFactory() { reset_hwwsk_chan(); }
keymaster_error_t GenerateKey(const AuthorizationSet& key_description,
UniquePtr<Key> attestation_signing_key,
const KeymasterBlob& issuer_subject,
KeymasterKeyBlob* key_blob,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced,
CertificateChain* cert_chain) const override;
keymaster_error_t ImportKey(
const AuthorizationSet& key_description,
keymaster_key_format_t input_key_material_format,
const KeymasterKeyBlob& input_key_material,
UniquePtr<Key> attestation_signing_key,
const KeymasterBlob& issuer_subject,
KeymasterKeyBlob* output_key_blob,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced,
CertificateChain* cert_chain) const override;
keymaster_error_t LoadKey(KeymasterKeyBlob&& key_material,
const AuthorizationSet& additional_params,
AuthorizationSet&& hw_enforced,
AuthorizationSet&& sw_enforced,
UniquePtr<Key>* key) const override;
handle_t get_hwwsk_chan(void) const;
void reset_hwwsk_chan(void) const;
private:
keymaster_error_t CreateHwStorageKeyBlob(
const AuthorizationSet& key_description,
const KeymasterKeyBlob& input_key_material,
KeymasterKeyBlob* output_key_blob,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const;
mutable handle_t hwwsk_chan_;
};
class HwStorageKey : public AesKey {
public:
HwStorageKey(KeymasterKeyBlob&& key_material,
AuthorizationSet&& hw_enforced,
AuthorizationSet&& sw_enforced,
const KeyFactory* key_factory)
: AesKey(std::move(key_material),
std::move(hw_enforced),
std::move(sw_enforced),
key_factory) {}
keymaster_error_t formatted_key_material(keymaster_key_format_t,
UniquePtr<uint8_t[]>*,
size_t*) const override;
};
} // namespace keymaster
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